*{
  margin: 0;
  padding:0;
}

html,body,#app{
  width: 100%;
  height: 100%;
  overflow: hidden;
}
/* 禁止选中 */
.noselect{   
  -moz-user-select: none; /*火狐*/
  -webkit-user-select: none;  /*webkit浏览器*/
  -ms-user-select: none;   /*IE10*/
  -khtml-user-select: none; /*早期浏览器*/
  user-select: none;
}